<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    .outer {
        width: 50vw;
        height: 50vw;
        background-color: #7c83fd;
    }
</style>
<body>
<div class="outer">

</div>
</body>
</html>
